Horsepower Inc (HPI)

HPi Performance Exhausts - Milwaukee 8 Bagger - Full Stainless

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - Milwaukee 8 Bagger - Shorty Stainless

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - 99-06 Touring HPi X CBear Stainless

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - M8 Softail Stainless

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - Bagger Twin Cam 09-16 - Full Stainless

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - Bagger Twin Cam 09-16 - Shorty Stainless

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - HPiXSDC Stainless FXR

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - Stainless System for Dyna '06+

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

HPi Performance Exhausts - HPiXSDC Stainless Dyna '01-'05

Horse Power Inc. EXHAUSTS HPi Performance Exhausts are 100% handmade in-house, in the USA, TIG welded, and feature a perforated stainless muffler interior.  Exhausts are available in...

Horsepower, Inc HPI-58D6-18B - Throttle Body - Black - 58/1.80

Completely replaces OEM throttle body and manifold; fully compatible with OEM components Specifically designed for larger cubic inch motors that require substantial airflow Equipped with a sealed...

Horsepower, Inc HPI-58D6-76B - Throttle Body - Black - 58/1.76

Completely replaces OEM throttle body and manifold; fully compatible with OEM components Specifically designed for larger cubic inch motors that require substantial airflow Equipped with a sealed...

Horsepower, Inc HPI-55D6-16B - Throttle Body - Black - 55mm/1.66

Includes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and seals Flow bench-tested and dyno-proven to deliver increased airflow, horsepower and torque Brass...

Horsepower, Inc HPI-51D6-16B - Throttle Body - Black - 51mm/1.66

Includes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and seals Flow bench-tested and dyno-proven to deliver increased airflow, horsepower and torque Brass...

Horsepower, Inc HPI-55MF6-18B - Throttle Body - Black - 55/1.80

Completely replaces OEM throttle body and manifold; fully compatible with OEM components Specifically designed for larger cubic inch motors that require substantial airflow Equipped with a sealed...

Horsepower, Inc HPI-55D6-18B - Throttle Body - Black - 55mm/1.80

Includes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and seals Flow bench-tested and dyno-proven to deliver increased airflow, horsepower and torque Brass...

Throttle Body - 58/1.80

FeaturesCompletely replaces OEM throttle body and manifold; fully compatible with OEM componentsSpecifically designed for larger cubic inch motors that require substantial airflowEquipped with a...

Throttle Body - 58/1.76

FeaturesCompletely replaces OEM throttle body and manifold; fully compatible with OEM componentsSpecifically designed for larger cubic inch motors that require substantial airflowEquipped with a...

Throttle Body - 55mm/1.66

FeaturesIncludes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and sealsFlow bench-tested and dyno-proven to deliver increased airflow, horsepower and torqueBrass...

Throttle Body - 51mm/1.66

FeaturesIncludes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and sealsFlow bench-tested and dyno-proven to deliver increased airflow, horsepower and torqueBrass...

Throttle Body - 55/1.80

FeaturesCompletely replaces OEM throttle body and manifold; fully compatible with OEM componentsSpecifically designed for larger cubic inch motors that require substantial airflowEquipped with a...

Horsepower, Inc HPI-51D6-17B - Throttle Body - Black - 51mm/1.71

FeaturesIncludes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and sealsFlow bench-tested and dyno-proven to deliver increased airflow, horsepower and torqueBrass...

Throttle Body - 55mm/1.80

FeaturesIncludes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and sealsFlow bench-tested and dyno-proven to deliver increased airflow, horsepower and torqueBrass...

Throttle Body - 51mm /1.71

FeaturesIncludes throttle body, CNC ported intake manifold, throttle cable bracket, intake flanges and sealsFlow bench-tested and dyno-proven to deliver increased airflow, horsepower and torqueBrass...

Injector Fuel - 6.2 gm/sec - Pair

FeaturesRecommended for "Big Inch" engines with large plenums (120 hp or greater)43% increase in flow over stock injectors6.2 gps (grams per second)Made in the U.S.A.Specs Riding Style: Street Flow...